Do you have an idea to change the world? That’s what we asked the 2013 Google Science Fair participants back in January, and students ages 13-18 from around the world met our challenge. Today, the finalists—representing eight different countries—gathered at Google headquarters in Mountain View, Calif. and presented their projects to a panel of esteemed judges. Attendees of the Fair and judges alike were wowed by the finalists’ passion for science and their drive to change the world.

The top 15 projects were selected from thousands of entries submitted by talented young scientists from more than 120 countries around the world. These projects were impressive and represented a vast range of scientific ingenuity—from a multi-step system created for early diagnosis of melanoma cancers to the invention of a metallic exoskeleton glove that assists, supports and enhances the movement of the human palm to help people who suffer from upper hand disabilities.

It was a tough decision, but we’re proud to name the three winners of this year’s Google Science Fair:

13-14 age category: Viney Kumar (Australia) — The PART (Police and Ambulances Regulating Traffic) Program. Viney’s project looked for new ways to to provide drivers with more notice when an emergency vehicle is approaching, so they can can take evasive action to get out of the emergency vehicle’s way.

15-16 age category: Ann Makosinski (Canada) — The Hollow Flashlight. Using Peltier tiles and the temperature difference between the palm of the hand and ambient air, Ann designed a flashlight that provides bright light without batteries or moving parts.

Thanks to all our 2013 finalists for their amazing projects and love for science. For updates on next year’s competition, see the Google Science Fair website.

Science and technology are crucial to solving many of the world’s greatest challenges. We started the Google Science Fair to support and foster the next generation of scientists and engineers. We look forward to seeing you change the world!